: Opens the factory test menu to check hardware like the screen, touch, and audio. *#6776#
This is the most crucial code. It opens the automatic/manual testing menu (AfterSales Page), allowing you to test the screen, camera, sensors, speaker, mic, and charger, as explained on the OPPO Community .
Launch your Dialer/Phone App from the home screen. Open the Dialer: Ensure you are on the keypad view. Enter the Code: Type the secret code (e.g., *#06# ).
Here’s a helpful, user-friendly content piece on using secret codes on the (running ColorOS, typically based on Android 9–11). how to use secret codes on oppo a9 2020 upd
Opens a comprehensive manual hardware test menu to check your screen, sensors, cameras, and more. (Feedback/Log Tool):
Q: What are secret codes? A: Secret codes are special numbers that, when dialed on your phone, open up hidden menus and allow you to access advanced features.
If your device is region-locked and you have an official unlock code, this dialer code prompts the input field. Prizm Institute Troubleshooting & Advanced Access Unlock Bypass: If you are locked out, you can enter the Emergency Call dialer and use to bypass certain setup screens after a reset. Recovery Mode: If dialer codes aren't enough, turn off your phone and hold Power + Volume Down : Opens the factory test menu to check
For most codes, the phone will automatically display the hidden menu as soon as the last character is typed. If it doesn’t work automatically, press the . Top Hidden Codes for Oppo A9 2020 (2026 Update)
There are a few reasons for this. The most common is simply typing the code incorrectly. Other reasons include your specific carrier disabling certain codes, or the code being meant for a different device chipset (e.g., a MediaTek code on a Snapdragon phone).
Go to Settings > About Phone, then tap “Build Number” seven times. This unlocks Developer Options, where you can enable USB debugging, monitor GPU usage, and change animation scales. Launch your Dialer/Phone App from the home screen
Apps like “Phone Doctor Plus” or “CPU-Z” can provide similar hardware information without requiring secret codes.
. Used to report system lags, battery drain, or GPS issues. *#6776#
